Title:
CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2019/155779
Kind Code:
A1
Abstract:
Provided is a control valve for a variable displacement compressor, with which the effects of refrigerant pressure on a main valve body can be effectively canceled out, and it is possible to avoid structural complications and size increases in physical constitution. A pressure-equalizing passage 15 is provided for guiding pressure Pc of a crank chamber exerted on a lower end of a main valve body 10 to a pressure-sensitive chamber 45, and causing the pressure Pc of the crank chamber to be exerted on an upper end of the main valve body 10, and when current conduction to (a solenoid part 30A of) an electromagnetic actuator 30 has been turned off (when a valve port 22 is fully open), intake pressure Ps is prevented from being guided into the pressure-sensitive chamber 45 from a Ps inlet/outlet 27 (a Ps in/out chamber 28), the pressure Pc of the crank chamber is guided into the pressure-sensitive chamber 45 via the pressure-equalizing passage 15, and the pressure Pc of the crank chamber is exerted on both the upper and lower ends of the main valve body 10.
More Like This:
| JPS5853198 | [Title of the Invention] Variable distance compressor |
| WO/2000/053927 | PISTON COMPRESSOR |
| WO/2010/031533 | COOLANT COMPRESSOR |
Inventors:
ITOH MASAHARU (JP)
SAKAMOTO TAKASHI (JP)
TANO SHINTARO (JP)
SHIMADA KENKI (JP)
SAKAMOTO TAKASHI (JP)
TANO SHINTARO (JP)
SHIMADA KENKI (JP)
Application Number:
PCT/JP2018/047969
Publication Date:
August 15, 2019
Filing Date:
December 26, 2018
Export Citation:
Assignee:
FUJIKOKI CORP (JP)
International Classes:
F04B27/18; F16K31/06
Foreign References:
| JP2012211579A | 2012-11-01 | |||
| JP4550651B2 | 2010-09-22 | |||
| JP5553514B2 | 2014-07-16 | |||
| JP4550651B2 | 2010-09-22 |
Other References:
See also references of EP 3751140A4
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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